Direct equalization method

1. A direct equalization communications system, comprising: an isolation switch connected to a receiving path, an amplifier connected to said isolation switch, a slicer connected to said amplifier, a received data detection circuit connected to said slicer, a filter coefficient calculation circuit connected to said slicer and a known training sequence providing circuit, a programmable filter circuit connected to said filter coefficient calculation circuit for equalizing data to be transmitted, a dual port switch having one port connected to said programmable filter circuit and having a second port connected to a circuit for providing a transmit training sequence, a D/A circuit connected to said dual port switch, and a line driver connected to said D/A circuit, said isolation switch and a transmission path.

2. The system of claim 1, further comprising a data buffer circuit connected between said programmable filter circuit and said dual port switch.

3. An equalizer system for communication channel frequency distortion compensation in a modem communication system, comprising: a receiver connected to receive input data from said communication channel; a transmitter including an output data buffer, a transmit training data sequence providing circuit, and a multiplexer connected for selectively transmitting output data from said buffer or training data from said transmit training data sequence providing circuit to said communication channel; a known training data sequence providing circuit; a channel frequency distortion compensation filter coefficient calculator coupled to said receiver and said known training data sequence providing circuit; and a programmable filter coupled to said calculator and to said output data buffer for filtering said output data based on filter coefficients determined by said calculator from correlating received transmitted training data with known training data from said known training data sequence providing circuit.